Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > Monsters > Fitting front sprocket to S4R

[antonye]

If it's the same as all the other Ducati ones - ie, it uses the locking plate with two bolts - then it's really easy.

You'll need to slacken off the chain a bit first, so get it on a paddock stand if you've got one.

Remove the sprocket cover and you'll see two bolts that go into the sprocket, which hold the locking plate in place.

Undo these two bolts - put the bike in top gear and it should lock the drive train enough to allow you to do this.

The locking plate should sit in the grove in the output shaft, but won't come off when it's aligned with the holes in the sprocket. The trick is to rotate the locking plate to align the splines and then remove it.

You should then be able to unhook the chain and slide the sprocket off.

Simple as that.

The workshop manual says 45-50 Nm of torque when you put the two sprocket locking plate nuts back in, but check with your own manual if you've got one (or wait for Nelly to correct me!)

If the bike was older, I'd say replace the nuts and the locking plate as well, as it'll cost you about £3, but given the age it's probably not worth it.